Multilayer ceramic capacitor including via-conductors and outer electrodes

Abstract

A multilayer ceramic capacitor includes a capacitor body, first and second via-conductors, first and second extended electrode portions, first and second outer electrodes, and an insulative resin. The capacitor body includes first and second inner electrodes. The first and second via-conductors are inside the capacitor body, and are respectively electrically connected to the first and second inner electrodes. The first and second extended electrode portions are respectively electrically connected to the first and second via-conductors. The first and second extended electrode portions are located on an outer surface of the capacitor body so as to extend to locations different from locations at which the first and second extended electrode portions are connected to the first and second via-conductors. The first and second outer electrodes are respectively electrically connected to the first and second extended electrode portions.

What is claimed is: 
     
       1. A multilayer ceramic capacitor comprising:
 a capacitor body including a plurality of dielectric layers, a plurality of first inner electrodes, and a plurality of second inner electrodes that are stacked in a stacking direction, and first and second outer surfaces that face each other in the stacking direction; 
 at least one first via-conductor inside the capacitor body and electrically connected to the first inner electrodes; 
 at least one second via-conductor inside the capacitor body and electrically connected to the second inner electrodes; 
 a first extended electrode portion electrically connected to the at least one first via-conductor and provided on one of the first and second outer surfaces of the capacitor body such that the first extended electrode portion extends to a location different from a location at which the first extended electrode portion is connected to the at least one first via-conductor; 
 a second extended electrode portion electrically connected to the at least one second via-conductor and provided on the one of the first and second outer surfaces of the capacitor body such that the second extended electrode portion extends to a location different from a location at which the second extended electrode portion is connected to the at least one second via-conductor; 
 a plurality of first outer electrodes electrically connected to the first extended electrode portion at the one of the first and second outer surfaces of the capacitor body; 
 a plurality of second outer electrodes electrically connected to the second extended electrode portion at the one of the first and second outer surfaces of the capacitor body; and 
 an insulative resin providing insulation between the first extended electrode portion and the second extended electrode portion, and between the plurality of first outer electrodes and the plurality of second outer electrodes; wherein 
 a number of the plurality of first outer electrodes electrically connected to the first extended electrode portion at the one of the first and second outer surfaces of the capacitor body is greater than a number of the at least one first via-conductor; and 
 a number of the plurality of second outer electrodes electrically connected to the second extended electrode portion at the one of the first and second outer surfaces of the capacitor body is greater than a number of the at least one second via-conductor. 
 
     
     
       2. The multilayer ceramic capacitor according to  claim 1 , wherein
 the insulative resin covers the first extended electrode portion and the second extended electrode portion; 
 the plurality of first outer electrodes are located above the insulative resin and connected to the first extended electrode portion by extending through the insulative resin; and 
 the plurality of second outer electrodes are located above the insulative resin and connected to the second extended electrode portion by extending through the insulative resin. 
 
     
     
       3. The multilayer ceramic capacitor according to  claim 1 , wherein
 the insulative resin covers an entirety or substantially an entirety of the one of the first and second outer surfaces on which the first extended electrode portion and the second extended electrode portion are provided. 
 
     
     
       4. The multilayer ceramic capacitor according to  claim 1 , wherein each of the first extended electrode portion and the second extended electrode portion includes a wiring pattern that extends linearly. 
     
     
       5. The multilayer ceramic capacitor according to  claim 1 , wherein the insulative resin is a polyimide resin. 
     
     
       6. The multilayer ceramic capacitor according to  claim 1 , wherein each of the plurality of dielectric layers includes BaTiO 3 , CaTiO 3 , SrTiO 3 , SrZrO 3 , or CaZrO 3  as a major component. 
     
     
       7. The multilayer ceramic capacitor according to  claim 6 , wherein each of the plurality of dielectric layers includes an Mn compound, an Fe compound, a Cr compound, a Co compound, or an Ni compound as a sub-component. 
     
     
       8. The multilayer ceramic capacitor according to  claim 1 , wherein the capacitor body has a lengthwise dimension of greater than or equal to about 0.3 mm and less than or equal to about 3.0 mm, a widthwise dimension of greater than or equal to about 0.3 mm and less than or equal to about 3.0 mm, and a dimension of greater than or equal to about 50 μm and less than or equal to about 200 μm in a stacking direction. 
     
     
       9. The multilayer ceramic capacitor according to  claim 1 , wherein each of the plurality of first and second inner electrodes includes Ni, Cu, Ag, Pd, Pt, Fe, Ti, Cr, Sn, or Au, or an alloy or other composite material including Ni, Cu, Ag, Pd, Pt, Fe, Ti, Cr, Sn, or Au. 
     
     
       10. The multilayer ceramic capacitor according to  claim 1 , wherein a thickness of each of the plurality of first and second inner electrodes greater than or equal to about 0.3 μm and less than or equal to about 1.0 μm. 
     
     
       11. The multilayer ceramic capacitor according to  claim 1 , wherein a sum of the plurality of first and second inner electrodes is greater than or equal to 10 and less than or equal to 150. 
     
     
       12. The multilayer ceramic capacitor according to  claim 1 , wherein each of the first and second via-conductors includes Ni, Cu, Ag, Pd, Pt, Fe, Ti, Cr, Sn, or Au, or an alloy or other composite material including Ni, Cu, Ag, Pd, Pt, Fe, Ti, Cr, Sn, or Au. 
     
     
       13. The multilayer ceramic capacitor according to  claim 1 , wherein each of the first and second via-conductors has a cylindrical or substantially cylindrical shape. 
     
     
       14. The multilayer ceramic capacitor according to  claim 13 , wherein each of the first and second via-conductors has a diameter of greater than or equal to about 30 μm and less than or equal to about 150 μm. 
     
     
       15. The multilayer ceramic capacitor according to  claim 1 , wherein a distance between centers of the first and second via-conductors is greater than or equal to about 50 μm and less than or equal to about 500 μm. 
     
     
       16. The multilayer ceramic capacitor according to  claim 1 , wherein each of the first and second extended electrode portions includes Ni, Ag, Pd, Pt, Fe, Ti, Cr, Sn, or Au, or an alloy or other composite material including Ni, Ag, Pd, Pt, Fe, Ti, Cr, Sn, or Au. 
     
     
       17. The multilayer ceramic capacitor according to  claim 1 , wherein
 the number of the first outer electrodes is greater than or equal to four times the number of the at least one first via-conductor; and 
 the number of the second outer electrode is greater than or equal to four times the number of the at least one second via-conductor. 
 
     
     
       18. The multilayer ceramic capacitor according to  claim 1 , wherein each of the first and second extended electrode portions has a thickness of greater than or equal to about 50 nm and less than or equal to about 3 μm. 
     
     
       19. A multilayer ceramic capacitor comprising:
 a capacitor body including a plurality of dielectric layers, a plurality of first inner electrodes, and a plurality of second inner electrodes that are stacked; 
 a first via-conductor inside the capacitor body and electrically connected to the first inner electrodes; 
 a second via-conductor inside the capacitor body and electrically connected to the second inner electrodes; 
 a first extended electrode portion electrically connected to the first via-conductor and provided on an outer surface of the capacitor body such that the first extended electrode portion extends to a location different from a location at which the first extended electrode portion is connected to the first via-conductor; 
 a second extended electrode portion electrically connected to the second via-conductor and provided on the outer surface of the capacitor body such that the second extended electrode portion extends to a location different from a location at which the second extended electrode portion is connected to the second via-conductor; 
 a first outer electrode electrically connected to the first extended electrode portion; 
 a second outer electrode electrically connected to the second extended electrode portion; and 
 an insulative resin providing insulation between the first extended electrode portion and the second extended electrode portion, and between the first outer electrode and the second outer electrode; wherein 
 a number of the first outer electrodes is greater than or equal to four times a number of the first via-conductors; and 
 a number of the second outer electrode is greater than or equal to four times a number of the second via-conductors. 
 
     
     
       20. A multilayer ceramic capacitor comprising:
 a capacitor body including a plurality of dielectric layers, a plurality of first inner electrodes, and a plurality of second inner electrodes that are stacked; 
 a first via-conductor inside the capacitor body and electrically connected to the first inner electrodes; 
 a second via-conductor inside the capacitor body and electrically connected to the second inner electrodes; 
 a first extended electrode portion electrically connected to the first via-conductor and provided on an outer surface of the capacitor body such that the first extended electrode portion extends to a location different from a location at which the first extended electrode portion is connected to the first via-conductor; 
 a second extended electrode portion electrically connected to the second via-conductor and provided on the outer surface of the capacitor body such that the second extended electrode portion extends to a location different from a location at which the second extended electrode portion is connected to the second via-conductor; 
 a first outer electrode electrically connected to the first extended electrode portion; 
 a second outer electrode electrically connected to the second extended electrode portion; and 
 an insulative resin providing insulation between the first extended electrode portion and the second extended electrode portion, and between the first outer electrode and the second outer electrode; wherein 
 each of the first and second extended electrode portions has a thickness of greater than or equal to about 50 nm and less than or equal to about 3 μm.